Some colours are so similar it's difficult to pick out one from the other. Could some more variations be created by combining 2 or more with 'stripes' or even dots, it would be useful where some are so close to others. ?
earthtones, patterns within the colours or neon/metal colours would be usefull as well. some new colours could also be used as achievements for the levels beyond 50 ...
There are already 50 colours, although not available ten of them. The 50 player game seems better, and I agree to unlock it at a high level to ensure they are used in a responsible way.